Improvement in rotary steam-engines



' 3 Sheets -sheefl. H. JUNGLI NG. Improvement in Rotary Steam N0.130,300.

Engines;

Patented Au'g. 6,1872.

3Shees--$veet2. H. JUNGUNG. Improvement ih Rotary Steam-Engines.

UNITED STATES PATENT OFFICE.

HUGO JUNGLING, OF HANNOVER, PRUSSIA.

IMPROVEMENT IN ROTARY-STEAM-ENGINES.

- "Specification forming .part of Letters Patent No. 130,300, datedAugust 6, 1872.

Specification describing an Improvement in Rotary Engines, the inventionof HUGO J UNG- LING, of the city of Hannover, in the Kingdom of Prussia.

This invention relates to that description of rotary engines in which arevolving cylinder with pistons attached and radially sliding abutments,or revolving and radially-sliding pistons with abutments, carried by astation ary outer cylinder, are used; and the invention consists in anovel construction and certain combinations of parts, valves, and duetsor passages, whereby compactness, durability, and efiEiciency generallyare obtained, with facility for running the engine in oppositedirections, and either under afull head or pressure or with variableexpansion.

In the accompanying drawing, Figure 1 represents a plan of my improvedengine, in which steam will be referred to as the propelling agent; Fig.2, a horizontal central section at the line to w Fig. 3, a partlysectional side view at the line as so; Fig. 4, a transverse verticalsection at the line y y and Fig. 5, a sectional side or end view at theline z z.

Similar letters of reference indicate corresponding parts throughout theseveral figures of the drawing.

A is a stationary inner cylinder, supported by cylindrical side or endstuds a a in side pieces or bearings B B of the main frame.

' The two sides of this cylinder are closed by covers b b, of circularform, and fast to said cylinder, but of larger diameter than it, asclearly shown in Fig. 2. Within, and dividing such cylinder into equalparts, are three hollow radial partitions, c c 0, having within themradially-sliding abutments O O 0, each of which is capable of projectingthrough said cylinder, and the inner ends of which are constructed withcylindrical prolongations d d that fit within correspondingly-shapedchambers in the central portion of the cylinder A.

These sliding abutments C are also each provided with two opposite sidestuds, 6 0. Through each of the supporting-studs or fixed trunnions a aare three longitudinal ducts, ff f or f j j, arranged to communicate attheir inner ends with radial ducts g'g, extending through thecylindrical prolongations, and opening through opposite sides of thesliding abutments O at points which, when said abutments are forcedoutward, just project beyond the outer circumferential portion of thecylinder A. D is 'an outside revolving cylinder, arranged around thefixed cylinder A, but of larger diameter than it, so as to form steamspaces or chambers h h h, and having covers 6 i rigidly secured to it.This outer cylinder D fits lightly or easily upon the disks or covers bb of the cylinder A; and its covers are constructed to formsleeve-bearings on the fixed studs or trunnions a a. It is also providedon its inner periphery with two oppositely-arranged vfast blocks orpistons, E E, which rest freely upon the outer periphery of the fixedcylinder A. In the inner face of each cover z'of the cylinder D is acam-shaped groove, k, as shown in Figs. 2 and 4, and into which the sidestuds 0 of the sliding abutments 0, or rollers fitted on the ends of thestuds, enter, said studs passing through. radial slots lin the covers bof the stationary cylinder A. F is a main steam-pipe or system ofsteam-supply pipes, and G a main exhaustpipe or system of exhaust-pipes,arranged to com municate respectively and interchangeably through a pairof cocks or valves, H H, with boxes or chambers I I at opposite ends ofthe engine. These boxes or chambers are provided withcircularly-revolving disks or valves J J, each of which has twooppositely-disposed ports, m m, through it, and which are alternatelybrought into communication with the longitudinal ducts f ff on the oneside, and with the longitudinal ducts f f j on the other side-that is,the one valve with the one set I of ducts. and the other valve with theother. Such communication, however, is made indirectly throughcircularly-adjustable cut-ofl' valves K K, arranged between the valves JJ and fixed seats a a, through which latter the ducts f f extend. Thecut-off valves K K have each three elongated curved openings, 0 o 0, inthem, and may be operated or adjusted in a circular direction byworm-wheels on their peripheries and screws q. The valves J J arerevolved automatically by pinions-r r and spur-wheels s s from orthrough spur-gear t t on the sleeves of the revolving outer cylinder D.

Supposing steam to be admitted to the pipe F and through the cock H tothe chamber I, while the cock H is adjusted to establish communicationbetween the chamber 1 and exhaust-pipe G, then steam will be passedthrough the valves J and K, and successively or in regular order throughthe ducts f and 9 into the steam spaces or chambers h behind the pistonsE, so soon as the cam-shaped grooves 7c in the covers 0' of therevolving cylinder act upon the side studs 0 to throw and keep out theradial abutments O, exhaust at the same time being established on theopposite side of the abutments by means of the ducts g f and chamber 1through the valves J K. The cylinder D then revolves in the directionindicated by arrow in Fig. 4, and the camgrooves k operate in due courseto draw in the abutments G for passage of the pistons E of the cylinderD over them. On reversing the position of the cocks H H, so that thechamber I is in communication with the main steam-pipe F and the chamberI in connection with the main exhaust-pipe G, then the ducts f 9 becomeinlets and the ducts f 9 outlets, thereby reversing the motion of the engin e. The intervention of the cut-off valves K K between the valves J Jand the ports f f at the outer ends of the fixed trunnions a a, or fixedseats n n, arranged externally to said ends, provides for workin g thesteam in the engine either under full pressure or with a variable amountof expansion, according to the adjustment of the openings 0 0 o in thevalves K K relatively to the ducts f j, the revolving valves J J onlyhaving two ports in them, corresponding to the number of pistons E E. Ofcourse, only one of these cut-off valves K K is adjusted at a time tocontrol or affect the ducts f or j--that is, the one on the inlet sideof the-engine, according to the direction in which the latter may berunning-the other cut-off valve on the exhaust side of the engine thenbeing fully open.

As there are in the combination or arrangement shown in the drawing twotraveling pistons and three sliding abutments, the steam-spaces h areequivalent to three steamcylinders working simultaneously that is, twounder afull or expansive action of the steam, while the third ispreparing for new work. 7

Power may be taken from the revolving cylinder D either by belt orgearing. In some cases it maynot be necessary to reverse the engine, butonly to provide for its running in one direction, in which case a singlemain exhaust-duct may take the place of the three exhaust-ducts passingthrough the center of the inner cylinder, and the outer cylinder mightbe made stationary while the inner one revolves.

Having thus described my improvement in rotary engines, I claim- Thecombination of the cooks H H with the steam and exhaust pipes F G, therevolving valves J J, the cut-off valves K K, the main inlet and outletducts f f f and f f f, the radially-sliding abutments G C O with theirinlet and outlet ducts g g, the cylinders A D, and the pistons E E,substantially as specified.

This specification signed by me this ninth day of April, 1872.

HUGO JUNGLING, Witnesses:

JULIUs ALBRECHT, Brennan RoEssrN.

